looped_around Line messaging app posted a notification that GOS is phasing out 32 bit apps. It makes sense but what's the option then? I pulled it off obtainium. No line app? line is a Japanese message app
GrapheneOS looped_around Support for 32-bit apps is already gone on the Pixel 7 and later for the stock OS and AOSP. You downloaded the wrong variant of the app. You should switch to the proper variant of the app for your device instead of using a 32-bit variant of the app on a 64-bit device.
charles25565 Obtainium should show an arm64/aarch64 app. Use that one. All of the devices that GrapheneOS supports are 64-bit devices, so it should work.
GrapheneOS Google Play Store doesn't allow 32-bit-only apps since years ago and stopped allowing installing them on 64-bit devices too. This is only an issue because people are redistributing 32-bit-only variants of apps outside of the Play Store instead of modern variants.